# STC SE03498AT

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Air Plains Services Corporation, United States
- Description: Conversion of Lycoming IO-540-D4B5 to Alamo Aerospace Model IO-540-D4B5-AA that has the same performance ratings and limitations as Lycoming Model IO-540-D4B5
- Applied: May 15, 2007
- Status date: August 14, 2018
- Product: Engine
- Certification basis: Part 13, Part 21
- Data sheets: [TCDS 1E4](https://openairdocs.org/tcds/1E4)
- Certificate PDF: https://openairdocs.org/files/sha256/d3/aa/d3aadfbe8b9578307dc303daac6f0d14255845cdfdcef902ea179c7600634fe6
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/A62C25653674D6AC862585C10048F188.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SE03498AT

## ADs that name it (0)

None.

## Approved models (1)

- Lycoming Engines IO-540-D4B5 ([TCDS 1E4](https://openairdocs.org/tcds/1E4))

## What the certificate says

Read from the PDF's text layer, without the form's printed wording; the layout is lost and the order can differ. The PDF is the record.

FAA Form 8110-2 (5/14) Page 1 of 2

Number: SE03498AT

Parts 13* of the Civil Air Regulations. (*CAR 13 effective June 15, 1956, as Amended by 13-1, 13-2, and 13-3)

Original Product – Type Certificate Number: 1E4 Make: Lycoming Engines Model: IO-540-D4B5

Conversion of Lycoming IO-540-D4B5 to Alamo Aerospace Model IO-540-D4B5-AA that has the same performance ratings and limitations as Lycoming Model IO-540-D4B5 except for an oil sump capacity of 8 US quarts. Conversion of Model IO-540-D4B5 to Model IO-540-D4B5-AA shall be performed in accordance with Alamo Aerospace Engine Assembly Drawing 1402, Revision New dated June 22, 2007, or later FAA Approved revision.

The installer must determine whether this design change is compatible with previously approved modifications. If the holder agrees to permit another person to use this certificate to alter a product, the holder must give the other person written evidence of that permission. The Model IO-540-D4B5-AA shall be installed, operated and maintained in accordance with Alamo Aerospace Report 99008-6, Operator’s Manual Supplement for a Lycoming IO-540-D4B5 Engine Modified per Alamo Aerospace STC. No.

SE03498AT, Revision New dated September 14, 2007, and Alamo Aerospace Report 99008-5, Instructions for Continued Airworthiness for a Lycoming IO-540-D4B5 Engine Modified per Alamo Aerospace STC No. SE03498AT, Revision New dated September 18, 2007, or later FAA Approved Revisions.

Date of Application: May 15, 2007 Date Reissued: August 14, 2018 Date of Issuance: October 16, 2007 Date Amended:

Signature

Title Jim Grigg Manager, Fort Worth ACO Branch, Compliance & Airworthiness Division Aircraft Certification Service Air Plains Services, Corporation 439 N. West Road Wellington, KS 67152

FAA Form 8110-2 (5/14) Page 2 of 2

FAA Form 8110-2 (5/14) Page 2 of 2

Transfer the ownership of Supplemental Type Certificate Number: SE03498AT

To (Name and address of transferee)

From (Name and address of grantor)

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SA4704SW

FAA Form 8110-2 (5/14) Page 2 of 2

## Every issue (2)

- August 14, 2018: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/d3/aa/d3aadfbe8b9578307dc303daac6f0d14255845cdfdcef902ea179c7600634fe6)
- October 16, 2007: Issued, Historical. [certificate](https://openairdocs.org/files/sha256/e0/9a/e09a2d2775cc0686f7ba2a211341d98ff32a205816e1282233a32e0c3af2dbed)

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